Spark-arrester



(No Model.)

T. H. SCHRODER.

SPARK ARRESTER.

. No. 535,262. Patented Mar. 5,1895.

meniarw 4 (iv g5 UNITED STATES I PATENT EEICE.

THOMAS H. SOHRODER, OF JACKSON, TENNESSEE.

SPARK-ARRESTER.

SPECIFICATION formingpart of Letters Patent No. 535,262, dated March 5,1895.

" Application filed November 15, 1894- Serial No. 528,925. (No model.)

To all whom it may concern:

Be it known that I, THOMAS H. SOHRODER, a citizen of the United States,residing at Jackson, in the county of Madison and State of Tennessee,have invented a certain new, useful, and valuable Improvement in Spark-Arresters, of which the following is a full, clear, and. exactdescription.

My invention has relation to spark arresters adapted especially to beapplied to locomotive engines, and it consists in the novel constructionand arrangement of its parts as hereinafter described.

In the accompanying drawings, Figure 1 represents the forward end of alocomotive boiler partly in section, and showing the spark arrester.Fig. 2 is a detail view of a secondary arrester.

The deflected sheet metal plate 1, is secured in front of the boilerflues 2. Said plate extends all the way across the smoke box, and it'hassecured to its lower end the sliding plate 3, said sliding plate havingan elongated perforation by means of which it can be raised or loweredand secured in place by the bolt and nut attached to the plate 1, andpassing through said elongated perforation.

The perforated sheet 4, extends generally in a diagonal line across thefront end of the smoke box. The rear end of said sheet extends to,within a short distance of the plate 1, and the front part of said sheet4, is hinged at- 5, and is held in place by the catch 6, attached to theside of the smoke box. Thus the plate 1, and the sheet 4, form what maybe termed an exaggerated funnel.

A second perforated sheet 7, is secured to the plate 1, and said sheet7, extends over the opening between the said plate 1, and the end of thesheet 4, and said sheet 7, extends to within a short distance of thesheet 4. Said sheet 7, is preferably convexed on its upper surface, asshown. The exhaust steam nozzle 8, extends up through the sheet 4, andthe end of said nozzle is directly under the stack 9. An additionalarrester 10, is located in said stack. Said additional or secondaryarrester consists of a sheet of perforated material formed into a hollowcone or a pyramid, with the opening 11, at the top. The said opening 11,is above the end of the steam n0zzle 8, and the steam from said nozzlepasses through said opening.

The detail view (Fig. 2) shows arrester 10, attached to the stack, andhaving a space between the sides of the stack and the lower end of thearrester.

In operation the device acts as follows: The smoke, sparks, 850., comefrom the fines 2, and are deflected down by the plate 1, the plate 3,having been previously adjusted to regulate the draft. The larger sparkswill strike the said plate and will fall to the bottom of the smoke box,but some of the finer sparks will follow the draft, and as the smoke,&c., passes the front of the smoke box preparatory to ascending andpassing out of the stack, the most of the said finer sparks will strikeagainst the perforated sheet 4, at an angle and will glance off to thebottom of the smoke box. Should some of the finer sparks pass throughthe perforations in the sheet 4, they will be carried back and will fallupon the sheet 7, and will then pass through the opening between saidsheet 7, and sheet 4, and they will then pass through the openingbetween sheet 4, and the plate 1, and will fall into the smoke box. Thesecondary arrester 10', in the stack is designed to arrest any sparksthat should be carried up by the jet from the steam nozzle 8. The sparkswill either strike against the sides of the arrester 10, and be rejectedor they will strike the sides and be pulverized and pass off as dust.

Should any sparks get behind the arrester 10, they will fall down intothe smoke box. See detail view Fig. 2.

By placing the perforated sheets on an incline as shown they are not soliable to be clogged up by sparks lodging therein, and hence the draftis not interfered with. Therefore this sparkarrester is an economizer ofheat and coal as the fire will always have a good draft.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

In combination with a boiler having fines, smoke box and stack, a sparkarrester consisting of a metallic plate placed in front of the fiues; asheet of perforated material located between the lower end of themetallic plate and the stack, said perforated sheet extending to withina short distance of said Inetallic plate and having an opening betweenthe end thereof and said plate; a second sheet of perforated materiallocated over the opening between the metallic plate and the first saidsheet of perforated material, said second sheet of perforated materialextending from the metallic plate to Within a short distance of thefirst perforated sheet and having an IQ opening between the end thereofand said first perforated plate, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS H. SOHRODER. Witnesses:

H. D. BURNELL, M. B. HURT.

